package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;


    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        // 保存套餐的基本信息， 操作setmeal, 执行insert
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        for (int i = 0; i < setmealDishes.size(); i ++ ) {
            setmealDishes.get(i).setSetmealId(setmealDto.getId());
        }
        // 保存套餐和菜品的关联信息， 操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    @Override
    @Transactional
    public void removeWithDish(List<Long> id) {
        // 查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId, id);
        queryWrapper.eq(Setmeal::getStatus, 1);

        int count = (int) this.count(queryWrapper);
        if (count > 0) {
            // 如果不能删除，抛出一个业务异常
            throw new CustomException("套餐正在售卖，不能删除");
        }

        // 如果可以删除，先删除套餐表中的数据 -- setmeal
        this.removeByIds(id);

        // 删除关系表中的数据 -- setmeal_dish
        LambdaQueryWrapper<SetmealDish> queryWrapper1 = new LambdaQueryWrapper<>();
        queryWrapper1.in(SetmealDish::getSetmealId, id);
        setmealDishService.remove(queryWrapper1);
    }
}

